// For license of this file, see <project-root-folder>/LICENSE.md.

#include "services/abstract/recyclebin.h"

#include "miscellaneous/application.h"
#include "miscellaneous/databasequeries.h"
#include "miscellaneous/iconfactory.h"
#include "miscellaneous/textfactory.h"
#include "services/abstract/cacheforserviceroot.h"
#include "services/abstract/serviceroot.h"

#include <QThread>

RecycleBin::RecycleBin(RootItem* parent_item) : RootItem(parent_item), m_totalCount(0),
  m_unreadCount(0) {
  setKind(RootItem::Kind::Bin);
  setId(ID_RECYCLE_BIN);
  setIcon(qApp->icons()->fromTheme(QSL("user-trash")));
  setTitle(tr("Recycle bin"));
  setDescription(tr("Recycle bin contains all deleted messages from all feeds."));
  setCreationDate(QDateTime::currentDateTime());
}

QString RecycleBin::additionalTooltip() const {
  return tr("%n deleted message(s).", nullptr, countOfAllMessages());
}

int RecycleBin::countOfUnreadMessages() const {
  return m_unreadCount;
}

int RecycleBin::countOfAllMessages() const {
  return m_totalCount;
}

void RecycleBin::updateCounts(bool update_total_count) {
  bool is_main_thread = QThread::currentThread() == qApp->thread();
  QSqlDatabase database = is_main_thread ?
                          qApp->database()->connection(metaObject()->className()) :
                          qApp->database()->connection(QSL("feed_upd"));

  m_unreadCount = DatabaseQueries::getMessageCountsForBin(database, getParentServiceRoot()->accountId(), false);

  if (update_total_count) {
    m_totalCount = DatabaseQueries::getMessageCountsForBin(database, getParentServiceRoot()->accountId(), true);
  }
}

QList<QAction*> RecycleBin::contextMenuFeedsList() {
  if (m_contextMenu.isEmpty()) {
    QAction* restore_action = new QAction(qApp->icons()->fromTheme(QSL("view-refresh")),
                                          tr("Restore recycle bin"),
                                          this);
    QAction* empty_action = new QAction(qApp->icons()->fromTheme(QSL("edit-clear")),
                                        tr("Empty recycle bin"),
                                        this);

    connect(restore_action, &QAction::triggered, this, &RecycleBin::restore);
    connect(empty_action, &QAction::triggered, this, &RecycleBin::empty);

    m_contextMenu.append(restore_action);
    m_contextMenu.append(empty_action);
  }

  return m_contextMenu;
}

QList<Message> RecycleBin::undeletedMessages() const {
  const int account_id = getParentServiceRoot()->accountId();
  QSqlDatabase database = qApp->database()->connection(metaObject()->className());

  return DatabaseQueries::getUndeletedMessagesForBin(database, account_id);
}

bool RecycleBin::markAsReadUnread(RootItem::ReadStatus status) {
  QSqlDatabase database = qApp->database()->connection(metaObject()->className());
  ServiceRoot* parent_root = getParentServiceRoot();
  auto* cache = dynamic_cast<CacheForServiceRoot*>(parent_root);

  if (cache != nullptr) {
    cache->addMessageStatesToCache(parent_root->customIDSOfMessagesForItem(this), status);
  }

  if (DatabaseQueries::markBinReadUnread(database, parent_root->accountId(), status)) {
    updateCounts(false);
    parent_root->itemChanged(QList<RootItem*>() << this);
    parent_root->requestReloadMessageList(status == RootItem::ReadStatus::Read);
    return true;
  }
  else {
    return false;
  }
}

bool RecycleBin::cleanMessages(bool clear_only_read) {
  QSqlDatabase database = qApp->database()->connection(metaObject()->className());
  ServiceRoot* parent_root = getParentServiceRoot();

  if (DatabaseQueries::purgeMessagesFromBin(database, clear_only_read, parent_root->accountId())) {
    updateCounts(true);
    parent_root->itemChanged(QList<RootItem*>() << this);
    parent_root->requestReloadMessageList(true);
    return true;;
  }
  else {
    return false;
  }
}

bool RecycleBin::empty() {
  return cleanMessages(false);
}

bool RecycleBin::restore() {
  QSqlDatabase database = qApp->database()->connection(metaObject()->className());
  ServiceRoot* parent_root = getParentServiceRoot();

  if (DatabaseQueries::restoreBin(database, parent_root->accountId())) {
    parent_root->updateCounts(true);
    parent_root->itemChanged(parent_root->getSubTree());
    parent_root->requestReloadMessageList(true);
    return true;
  }
  else {
    return false;
  }
}